NMR Study of Ferromagnetic Rare Earth Metals and Alloys

Abstract

NMR of several rare earth elements were observed in ferromagnetic rare earth metals and alloys. Generally, the observed lines were split by a nuclear electric quadrupole interaction. By analyzing the observed changes of the magnetic and electric quadrupole hyperfine interactions of Tb and Dy in alloy systems of Tb–Dy, Tb–Gd, and Dy–Gd, as compared with those in pure metals, it is concluded that there exists a considerable contribution of conduction electron polarization to the magnetic hyperfine interaction and that of crystalline field to the quadrupole interaction. T1 and T2 of Dy in Dy metal were measured and it is suggested that Pincus-Winter mechanism and Suhl-Nakamura interaction contribute to T1 and T2, respectively.